Metadata information for a view

If i query dbc.columns for a particular table within a database it gives me column data type with its length.However if i have a custom view that is build on top of lets suppose 2 tables and if i query dbc.columns for this view it won't give me the column datatypes or length of columns in the view.

Any suggestion on how can i get column datatype and length of the columns in this custom view.